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http://dx.doi.org/10.3795/KSME-A.2013.37.9.1175

Evaluation of Improvement of Detection Capability of Infrared Thermography Tests for Wall-Thinning Defects in Piping Components by Applying Lock-in Mode  

Kim, Jin Weon (Dept. of Nuclear Engineering, Chosun Univ.)
Yun, Kyung Won (Dept. of Mechanical Design Engineering, Chosun Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.37, no.9, 2013 , pp. 1175-1182 More about this Journal
Abstract
The lock-in mode infrared thermography (IRT) technique has been developed to improve the detection capability of defects in materials with high thermal conductivity, and it has been shown to provide better detection capability than conventional active IRT. Therefore, to investigate the application of this technique to nuclear piping components, lock-in mode IRT tests were conducted on pipe specimens containing simulated wall-thinning defects. Phase images of the wall-thinning defects were obtained from the tests, and they were compared with thermal images obtained from conventional active IRT tests. It showed that the ability to size the detected wall-thinning defects in piping components was improved by using lock-in mode IRT. The improvement was especially apparent when detecting short and narrow defects and defects with slanted edges. However, the detection capability for shallow wall-thinning defects did not improve much when using lock-in mode IRT.
Keywords
Infrared Thermography; Wall-Thinning Defects; Detection Capability; Lock-in Mode; Piping Components;
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Times Cited By KSCI : 1  (Citation Analysis)
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